211. Simon invented a universal opener. It opens everything, instantly! It opens all cans and bottles, including medicine bottles. It opens cardboard boxes. It opens those annoying blister packs, large and small. It opens those annoying DVD cases. It's about the size of a man's thumb. It uses sound waves, but it makes no noise. It operates on one AA battery. It costs $5. "It's the greatest thing since the wheel," said one user. "It's the greatest thing since flip‐flops," said another. "It's the greatest thing since the Big Mac," said another. Everyone raves about Simon's opener. It's made everyone's life better. It's made Simon rich. But he wants to improve his invention. "How could you possibly improve it?" asked his wife. "The only thing better would be if you could just TELL a package to open." Simon said, "Bingo! You read my mind. That's exactly what I'm going to do!" 4.6